河口海岸污水稀释扩散特性的试验研究  

Experimental study on characteristics of sewage dilution and dispersion in estuarine and coastal areas

作　　者：叶涛焱 杭锦程 周晶晶[1] 林天耀 宗凌韬 罗成[1] 

机构地区：[1]河海大学港口海岸与近海工程学院,江苏南京210098

出　　处：《水资源保护》2016年第4期131-135,共5页Water Resources Protection

基　　金：国家自然科学基金(201285312);高等学校博士学科点专项科研基金(20110094120020)

摘　　要：通过环形水槽排污试验,对河口海岸地区污水的掺混和输移特性开展试验研究,研究污水的喷射方向、排放高度、温度对污水在环境水体中输移扩散特性的影响,旨在为研究污水在河口海岸地区的掺混和输移特性提供参考依据。结果表明,污水在环境水体中的稀释扩散效果主要受水平方位角和竖直射流角度的影响,污水排放方向与环境水体流向夹角越小,在水体中完全扩散均匀所需距离越长。高温污水完全稀释扩散的距离要长于常温污水。在试验的有限水深范围内,污水的排放高度对污水的稀释扩散没有显著影响,污水在排放近区均未扩散到水深7.5 cm以上区域。A sewage discharge experiment was carried out using an annular flume to study the characteristics of the mixing and transportation of sewage water in estuarine and coastal areas. The effects of sewage ejection direction, sewage discharge height, and temperature on the characteristics of transportation and dispersion of sewage in environmental water were investigated, providing references for this study. The experimental results show that the dilution and dispersion of sewage in environmental water are mainly affected by the horizontal and vertical angles. With a smaller the angle between the environmental water flow direction and the sewage water discharge direction, the distance required for homogeneous dispersion of sewage in the water will be longer. High-temperature sewage requires a longer distance for thorough dilution and dispersion than normal-temperature sewage. Due to the limited depth of water in the experiment, the height of sewage discharge had no significant effect on the dilution and dispersion of sewage, and no sewage dispersed to heights above 7. 5 cm in the near field of discharge.

关 键 词：排污方式 污水扩散 河口海岸 环形水槽 物模试验 

分 类 号：X143[环境科学与工程—环境科学]